ios - 当单击推送通知以及应用程序也在后台时，ViewController 丢失了引用

Question

1. 应用程序在后台
2. 推送通知被接收并点击
3. 应用程序将打开并重定向到 SecondViewController 并单击后退按钮
4. 当从 SecondViewController 单击返回按钮并返回到 FirstViewController 时，“菜单”会丢失来自 MenuViewController 的引用

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5. 推送通知被接收并点击

6. 应用程序将打开并重定向到 SecondViewController 并单击后退按钮

7. 当从 SecondViewController 单击返回按钮并返回到 FirstViewController 时，“菜单”会丢失来自 MenuViewController 的引用

我的代码：

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    if (application.applicationState == UIApplicationStateActive) {
        .......
    } else {
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        UINavigationController *navigationController=[[UINavigationController alloc] init];
        self.window.rootViewController = nil;
        self.window.rootViewController = navigationController;

        MenuViewController *menuViewController = [storyboard instantiateViewControllerWithIdentifier:@"MenuViewController"];
        [navigationController pushViewController:menuViewController animated:NO];

        HomeViewController *homeViewController = [storyboard instantiateViewControllerWithIdentifier:@"HomeViewController"];
        [navigationController pushViewController:homeViewController animated:NO];

        AllNewsNotificationViewController *allNewsNotificationViewController  = [storyboard instantiateViewControllerWithIdentifier:@"AllNewsNotificationViewController"];
        [navigationController pushViewController:allNewsNotificationViewController animated:YES];

        [self.window makeKeyAndVisible];
    }

我的 MenuViewController 实现：

@implementation MenuViewController

- (id)init {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    self = [storyboard instantiateViewControllerWithIdentifier:@"MenuViewController"];
    
    if (!self) {
        return self;
    }
    
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.homeViewController];
    
    NSDictionary *options = @{
                              PKRevealControllerRecognizesPanningOnFrontViewKey : @YES,
                              PKRevealControllerDisablesFrontViewInteractionKey : @NO
                              };
    
    self.revealController = [SubviewPKRevealViewController revealControllerWithFrontViewController:self.navigationController leftViewController:self options:options];
    self.revealController.revealDelegate = self.homeViewController;
    
    // The target view controller must implement this method
    self.navBarGesture =  [[UIPanGestureRecognizer alloc] initWithTarget:self.homeViewController action:@selector(menuPan:)];
    [self.navigationController.navigationBar addGestureRecognizer:self.navBarGesture];
    self.view.backgroundColor = [[Configurations sharedInstance] menuBackgroundColor];
    _topView.backgroundColor = [[Configurations sharedInstance] navegationbarBackgroundColor];
    
    return self;
}

MenuViewController 中的菜单快捷方式（按钮）丢失了引用并且不起作用。

标签： iosobjective-cuinavigationcontroller